Yamaha PSR-4000 - Manual (Page 104)

100
F1: Scale (Arabic)/Voice Part
The PSR-4000 has a range of advanced tuning and other voice-
related functions which are all included in the F1 function group.
■
SCALE (ARABIC)
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Selects either the normal equal temperament scale
or an “arabic” scale in which each note can be tuned
over a 127-cent range.
Use the SCALE LCD [▲/▼] controls to select
either the EQUAL TEMPERAMENT or ARABIC
scale.
When the ARABIC scale is selected you can use
the TUNE NOTE LCD [▲/▼] controls to select the
note you want to tune (the selected note will be
highlighted in the graphic keyboard in the upper
section of the display), then use the large ▲ and ▼
LCD [▲/▼] control to coarse-tune the selected key
in 25-cent steps, and the small
▲ and ▼ LCD [▲/▼]
control to fine-tune the selected note in 1-cent steps.
The tuning range is from “–64” through “0” to
“+63”. Each increment equals one cent (one “cent”
is one hundredth of a semitone). The current tuning
of each note is shown in the corresponding key of the
graphic keyboard display.
■
VOICE PART
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● PART TUNE
Individual tuning parameters are provided for
the LEFT, RIGHT 1, RIGHT 2, and LEAD voices,
allowing each voice to be tuned over a
±
100-cent
range.
When the AUTO mode is selected, part tuning is
automatic and the individual parts cannot be tuned
manually. To tune manually, first use the
MODE
LCD [▲/▼] control to select the MANUAL mode,
then use the LEFT, R1, R2, or LEAD LCD [▲/
▼]control to tune the corresponding voice as re-
quired. The current tuning value for each part is
shown next to the PART TUNE parameter in the
upper section of the display.